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Kyle Cureau
Asked: 2014-08-16 10:02:57 +0800 CST

SSH into EC2 with dynamic public IP address

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Typically I set ssh aliases as follows:

ssh -i ~/path/key.pem [email protected]

But with EC2 instances, the public-host-name changes whenever an instance is stopped and restarted.

My EC2 instances are on a VPN and have constant private IPs. What strategy can I use so that I can log into my instances without constantly changing the alias?

Thanks!

ssh

2 Answers

  1. You have to use a Dynamic DNS solution for this.

    You could use a DNS provider or configure your own Dynamic DNS server (there are a lot of tutorials for this). There are also scripts for using Route53 for this.

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  2. Best Answer

    The Private IP is not accessible from outside the AWS network and is only useful when you have a cluster of EC2 instances for communication between them with-in your security group.

    You could assign a Elastic IP to the instance or use a Dynamic DNS Solution.

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